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[130.180.211.218]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4b414b170d0sm95732535e9.1.2026.11.05.07.40.36 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Nov 2026 07:40:39 -0800 (PST) Message-ID: Date: Thu, 5 Nov 2026 16:40:34 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/2] ARM: configs: Enable the TEO cpuidle governor in multi-platform defconfigs To: Linus Walleij , Russell King , "Rafael J. Wysocki" , Daniel Lezcano , Ulf Hansson , Anna-Maria Behnsen , Frederic Weisbecker , Ingo Molnar , Thomas Gleixner , Arnd Bergmann , Krzysztof Kozlowski , Alexandre Belloni Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20261105-multi-timers-cpufreq-cpuidle-v2-0-2df7a17f4835@kernel.org> Content-Language: en-US From: Daniel Lezcano In-Reply-To: <20261105-multi-timers-cpufreq-cpuidle-v2-0-2df7a17f4835@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYxMTA1MDA2MiBTYWx0ZWRfX01zM3jaILuEA H3BfSyMZbSuPXw//VFE0UV1Ax9TScrhu14aeqj+5M/lMjCGjR8yYqAWDPhqKMvIpzoDz8wAvkfJ YorAslDSL0DGSb8TtHYQw412gqA+Upk= X-Proofpoint-ORIG-GUID: cWxVoFmvfenhq5CvS7drnTlOjw17fOcB X-Authority-Analysis: v=2.4 cv=U54Hnuru c=1 sm=1 tr=0 ts=6aeca37a cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=uw/3876vWhRnNVL35W6mqQ==:17 a=IkcTkHD0fZMA:10 a=zJRp6_cAMcgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=FcKzS_pcoyWHRQSGzCEA:9 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTA1MDA2MiBTYWx0ZWRfX0JNmyQmnlIwk NOG8txBsNCruTWzYOreQYw+PmbnPQn+3KmTnGWzw1KR7JqRcoCzBrZbvK/GSx7r1BiO8RaR2Kpv wavXfr0xpjAZRjyFXXF7fjxYYXhNzRp/LxBDgOqKDK3vysH2jyYaeByKmA3nsP7kyxED6gWJIDV r4NN62i1Ql0kQHivB8Gx2TrIVrEhM41gmwkqK1UcqbX/57e7xTvBxWEw602ogs8cZyvODeUDBbU nreoXNGg7wrBefatbnwlKkqdVWhpl3aqnpOIIqjbouRSN15tdZN72bfuuhta8srovxZAGSXpGeX 5jwDcDwZKrlwebmHICsSXH/KWh1IBWeouNWP6CxIYFLvxxf6PbL+bF5xHtCIxH4T5lbAhYVy34B cqCsFNi5QKFWrXUSx+xHQRnnVyWYEI13gk/UoqMFNh8zcpo0d7/zPYpAWySS8TcSPqoOHW6mIXe hExiiWqP1AHWalnyNWA== X-Proofpoint-GUID: cWxVoFmvfenhq5CvS7drnTlOjw17fOcB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-05_04,2026-11-04_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 phishscore=0 bulkscore=0 priorityscore=1501 lowpriorityscore=0 adultscore=0 spamscore=0 clxscore=1015 suspectscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610300000 definitions=main-2611050062 On 11/5/26 13:10, Linus Walleij wrote: > Enable the Timer Events Oriented (TEO) cpuidle governor in the ARM > multi_v5 and multi_v7 defconfigs. > > The upsides of the TEO governor are described in > commit b26bf6ab716f27955e2a503ffca1691582127cbb > "cpuidle: New timer events oriented governor for tickless systems" > by Rafael. > > We need to gain some traction for this governor. > > Both defconfigs already enable CPU_IDLE and NO_HZ_IDLE. Selecting > CPU_IDLE_GOV_TEO suppresses Kconfig's automatic menu selection, so TEO > becomes the default governor on these tickless configurations. > > Leave multi_v4t_defconfig unchanged. It uses periodic ticks, which > select the ladder governor and give it a higher runtime rating than > TEO. Enabling TEO alone would not make it the default. > > Configuration generation was checked for both patches. No hardware > runtime testing was performed. > > Prepared with OpenAI Codex assistance. > > Signed-off-by: Linus Walleij Reviewed-by: Daniel Lezcano